Quick install for Windows 7, Windows Server 2008 R2 - Certified
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This may be the last WHQL Certified release for Windows 7 and Windows
Server 2008 R2.  It is also WHQL Certified for Windows 8.1, Windows 10,
Windows Server 2012 R2, and Windows Server 2016, but is not the latest
WHQL Certified release for those.  It also supports Windows 8, but is
probably not WHQL Certified for that.

In short: run "CDM21228_Setup.exe".

For the regular, 32-bit editions, and the x64 (64-bit AMD, or Intel
EM64T) editions of these operating systems, run "CDM21228_Setup.exe".

The above command will pre-install the drivers.  This is the easiest
way to install the drivers for the USB serial converter.

These are combined VCP (Virtual COM Port) and D2XX drivers.  This means
that the device will appear as a COM port in Windows Device Manager, and
in addition to the regular Windows support for COM port devices, it
supports another programming interface known as D2XX.  (Details of the
D2XX programming interface may be found in the D2XX Programmer's Guide
elsewhere on this CD-ROM.)